Some American Airlines workers claim the new uniforms are making them sick

Some American Airlines employees are claiming that their new uniforms are causing them to have headaches and break out in hives, according to a report from the Chicago Business Journal.

The world's largest airline by fleet introduced new uniforms for pilots, flight attendants, and customer service employees earlier this month. It was the first time in almost 30 years that the company updated its uniforms.

More than 70,000 employees worldwide were outfitted in the new threads. But it didn't take long for the complaints to start coming in.

According to the report, more than 400 employees have already complained to their union about the issue. However, American Airlines told Business Insider that it has only received 14 complaints about the issue from all of the employees who received the new uniform.

"We have received reports from 14 flight attendants about sensitivity to the wool-rich fabric we use in the uniforms. We are working with those employees. The issues are isolated and related to a wool allergy," the company said in a statement to Business Insider.

"Developing the new look for our employees was a lengthy, complex process: Over the last three years we have done fabric, fit and wear tests to ensure our new uniforms not only meet but exceed safety and comfort levels," the company said in the statement.

The uniforms are manufactured by Twin Hill, a company that makes corporate uniforms. The fabrics used for the uniforms consist of a wool blend, while the shirts and blouses are made of cotton.